Alnico Magnets (28)

What are Alnico Magnets?

Alnico magnets, a classic in the world of magnetism, have been a foundational component of magnetic technology for nearly a century. Their name derives from the primary elements they are composed of: aluminium (Al), nickel (Ni), and cobalt (Co). These permanent magnets are renowned for their iconic red-painted horseshoe shape, a symbol ingrained in the collective memory and often associated with the concept of magnetism itself.

These magnets were first introduced in the 1930s and quickly became a staple in various applications due to their impressive magnetic strength at the time. Although they have been largely overshadowed in strength by the advent of rare-earth magnets like neodymium and samarium-cobalt, Alnico magnets still hold significant value in a variety of fields due to their unique properties.

What is the strength of Alnico Magnets

Alnico magnets are characterised by their excellent thermal stability and resistance to demagnetisation. While they may not match the sheer magnetic force of some modern magnets, they offer a reliable and consistent magnetic output, especially in environments subjected to high temperatures or requiring a stable magnetic field over a long period.

The magnetic strength of Alnico magnets is typically measured in terms of their energy product, with some of the strongest Alnico grades reaching up to 5 MGOe (megaGauss-Oersteds). This strength is sufficient for many industrial and commercial applications where extreme magnetic force is not a prerequisite.

What can you use Alnico Magnets for?

Alnico magnets have been integral in a multitude of applications due to their robustness and reliability. Their resistance to corrosion and excellent high-temperature performance make them suitable for use in electric motors, particularly those in automotive and aerospace industries where operating conditions can be harsh.

In the field of music, Alnico magnets are prized for their distinct tonal characteristics, making them a popular choice in guitar pickups and microphones. They are also widely used in sensors, relays, and various engineering applications where a stable magnetic field is required.

In educational settings, Alnico magnets serve as an excellent tool for teaching the principles of magnetism. Their familiar horseshoe shape and striking red colour make them both appealing and easy to handle for demonstrative purposes.

Does temperature affect Alnico Magnets?

One of the most notable properties of Alnico magnets is their exceptional performance under high temperatures. They can maintain their magnetic properties in environments reaching up to 550°C (1022°F), a feature that is crucial in applications like aerospace and automotive industries where components are often exposed to extreme heat.

Despite their high-temperature tolerance, Alnico magnets can be sensitive to demagnetising forces, including external magnetic fields and physical mishandling. However, with proper design and handling, these effects can be minimised, ensuring the longevity and effectiveness of the magnet.

What can FIRST4MAGNETS offer?

FIRST4MAGNETS is dedicated to providing a diverse range of high-quality Alnico magnets, catering to various industrial, commercial, and educational needs. Our selection includes magnets in different shapes and sizes, each meticulously tested and quality assured before dispatch.

Whether you need Alnico magnets for complex engineering projects, educational purposes, or specific commercial applications, our team is equipped to offer expert advice and solutions. We understand the critical role these magnets play in various fields and are committed to ensuring our customers receive the best products and support for their magnetic needs.